Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 247 · 40 questions

What you do (Dry out, crystals in): 1. An adult pours warm water into a cup. 2. Stir in salt, a spoon at a time, until no more dissolves. 3. Pour the salty water into a shallow dish and lay a string in it. 4. Leave it on a sunny windowsill, out of reach of small children, and check each day.

1. 1.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is what we measure? (a) the kind of salt (b) the amount of salt (c) days to see crystals (d) the same dish
2. 2.🧂 Does table salt dissolve in water? (a) does not dissolve (b) dissolves in water
3. 3.🔍 Which is the odd one out? (a) sugar (b) table salt (c) baking soda (d) small pebbles
4. 4.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “the amount of water”? (a) we change it (b) we measure it (c) we keep it the same
5. 5.True or false: a magnet is not needed for growing salt crystals. (a) True (b) False
6. 6.🧂 Which of these does not dissolve in water? (a) sand (b) baking soda (c) glucose powder (d) food colour
7. 7.🧂 Which of these dissolves in water? (a) small pebbles (b) chalk powder (c) glucose powder (d) cooking oil
8. 8.🧈 Can this change be undone: freezing water? (a) cannot be undone (b) can be undone
9. 9.🔍 Which is the odd one out? (a) cooking oil (b) food colour (c) chalk powder (d) sand
10. 10.🧈 Which of these is a change that cannot be undone? (a) rusting iron (b) dissolving salt (c) freezing water (d) melting ice
11. 11.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny spheres (b) tiny cubes (c) tiny stars (d) tiny triangles
12. 12.🧂 Which of these does not dissolve in water? (a) glucose powder (b) sawdust (c) table salt (d) food colour
13. 13.True or false: rusting iron is a change that cannot be undone. (a) True (b) False
14. 14.🧂 Why do we stir in salt until no more will dissolve? (a) to make it very salty (b) to make it fizz (c) to cool the water (d) to change its colour
15. 15.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: days to see crystals is what we measure. (a) True (b) False
16. 16.True or false: cooking oil does not dissolve in water. (a) True (b) False
17. 17.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is kept the same? (a) the kind of salt (b) sunny or shady place (c) days to see crystals
18. 18.🛟 Who should pour the warm water for the crystal experiment? (a) the youngest child (b) a friend who is running (c) a grown-up (d) nobody needs to
19. 19.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is kept the same? (a) days to see crystals (b) sunny or shady place (c) the amount of water
20. 20.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) salt (b) a spoon (c) a mirror (d) a shallow dish
21. 21.🧺 Do we need warm water for growing salt crystals? (a) not needed (b) needed
22. 22.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) salt crystals form (b) it turns to butter (c) it turns to oil (d) sugar crystals form
23. 23.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) a spoon (c) a magnet (d) a shallow dish
24. 24.🧈 Which of these is a change that cannot be undone? (a) folding paper (b) melting butter (c) dissolving salt (d) cooking an egg
25. 25.🧂 Does glucose powder dissolve in water? (a) dissolves in water (b) does not dissolve
26. 26.🛟 Where should you keep the crystal dish while it dries? (a) safe from small children (b) in a busy doorway (c) next to the baby (d) on the edge of a table
27. 27.🧺 Which of these is needed for growing salt crystals? (a) turmeric powder (b) a battery cell (c) yeast (d) a piece of string
28. 28.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the amount of salt is the one thing we change. (a) True (b) False
29. 29.True or false: a battery cell is needed for growing salt crystals. (a) True (b) False
30. 30.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “the same dish”? (a) we change it (b) we keep it the same (c) we measure it
31. 31.🧂 Which of these does not dissolve in water? (a) food colour (b) sugar (c) chalk powder (d) table salt
32. 32.🧈 Which of these is a change that cannot be undone? (a) melting butter (b) dissolving salt (c) freezing water (d) baking a cake
33. 33.🔮 Predict: you cover the dish so no water can escape. What happens? (a) few or no crystals (b) crystals grow faster (c) it turns sweet (d) it fizzes
34. 34.True or false: melting butter is a change that can be undone. (a) False (b) True
35. 35.🧂 Which of these dissolves in water? (a) chalk powder (b) sugar (c) sand (d) small pebbles
36. 36.🧂 Which of these does not dissolve in water? (a) table salt (b) baking soda (c) sugar (d) small pebbles
37. 37.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the same dish is the one thing we change. (a) False (b) True
38. 38.🧈 Which of these is a change that cannot be undone? (a) melting butter (b) folding paper (c) browning lemon ink (d) freezing water
39. 39.🧈 Which of these is a change that can be undone? (a) cooking an egg (b) freezing water (c) milk turning to curd (d) rusting iron
40. 40.True or false: sand dissolves in water. (a) True (b) False

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